Screw-cutting tool.



No. 786,990. PATENTED APR. 11, 1905.

' G. W. PHILLIPS.

SCREW CUTTING TOOL.

APPLIOATION FILED APR. 25, 1904.

UNITED STATES Patented April 11, 1905.

PATENT OFFICE.

CHARLES W. PHILLIPS, OF MILWAUKEE, WISCONSIN, ASSIGNOR OF ONE- HALF TOEUGENE F. JEWELL, OF MILWAUKEE, WISCONSIN.

SCREW-CUTTING TOOL SPECIFICATION forming part of Letters Patent N0.786,990, dated April 11, 1905.

Application filed Apri1 26, 1904. Serial No. 204-847.

.To (LZZ whom it may concern.-

Be it known that I, CHARLEs W. PHILLIPS, a citizen of the United States,residing at Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented certain new and useful Improvements inScrew-Cutting Tools; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to improvements in tools for cutting screw-threadsin pipes, pipefittings, and the like; and it consists in certain novelfeatures of construction, combination, and arrangement of partshereinafter fully described and claimed.

The objects of my invention are to rovide a simple and effective meansfor ho ding re movable cutters or chasers in a tap, reamer, or similartool-head, to permit them to be readily and accurately adjusted as theywear down, and to ermit them to be quickly removed and rep laced by newones when worn out.

With these and other objects in view the invention consists of certainnovel features of of parts, as will be more fully described, and

particularly pointed out in the appended claim.

In the accompanying drawings, Figure 1 is a perspective view of myimproved screwcutting tool. Fig. 2 is a transverse sectional viewthrough the same, taken on the line 2 2 ofFig. 1. Fig. 3 is a detailsectional view taken on the line 3 3 of Fig. 2. Fig. 4 is a sideelevation of one of the cutters or chasers. Fig. 5 is an end elevationof the same. Fig. 6 is a top plan view of one of the clampingblocks.Fig. 7 is a bottom plan view of the same.

Referring to the drawings by numeral, 1 denotes a frusto-conical body orhead tapering from its rear to its front end and formed at its rear endwith a reduced end or shank 2.

' Said head 1 is formed with a radially-dis- 4, Each alternate rib 4 isformed with a recess 5, which opens into two adjacent grooves 3. Saidgrooves 3 are adapted to receive cutters or chasers formed upon theirouter projecting faces with screw-cutting teeth 7 and upon their sideface which is disposed adjacent. to said recess 5 with notches 8. Therecesses 5 are adapted to receive segmentalshaped clamping-blocks 9,which are formed upon opposite sides with notches 10, adapted to engagesaid notches 8 upon two adjacent cutters or chasers to clamp them insaid grooves 3 andto hold them at any adjusted position, as will bereadily understood. Said clamping-blocks maybe secured in said recess inany suitable manner, but preferably by screws 11, which pass throughopenings in said block and into screw-threaded recesses 12, formed inthe head 1, as shown in Fig. 2 of thedrawings. The heads of said screws11' enter enlarged portions of the apertures in said blocks and lieflush with the outer surface of said head 1. i

The use'and operation of the tool will be readily seen. After thecutters or chasers have been placed in the grooves 3 the clamping-blocks9 are inserted between them in the recess 5, and the screws 11 are thentightened to clamp said cutters or chasers in position.

The engagement of the notches of the clamping-block with the notches 8on two adjacent cuttersor chasers will permit the latter to be quicklyand accurately adjusted as their cutting-teeth wear away.

ciple or sacrificing any of the advantages of I this invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is p In a combined reamer and tap,the combination of a tapering head having a series of longitudinalgrooves forming intermediate segmental ribs and having transverserecesses formed in each alternate one of said ribs, said recessescommunicating with said grooves, chasers seated in said grooves andhaving screw-cutting teeth upon their outer faces and notches in theirside faces adjacent to said recesses, said notches extending from thelower edge of the chasers to near the cutting-teeth, clamping-blocks insaid recesses,

said blocks having notches upon their opposite faces to engage thenotches in two adjacent chasers and screws passed through said blocksand into said head to secure the block in the recesses and the chasersin the longitudinal grooves whereby the chascrs are longitudinallyadjustable, substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing \vitnesses.

CHARLES WEPHILLIPS. Witnesses:

EUGENE JEWELL, Jon E. LIESENFELD.

